因为丢失文件导致的
    1、.bash_profile
    2、.bashrc 

    1. #!/usr/bin/env bash
    3. __main() {
    5.     if [[ "$(grep -v '^$' </root/.bash_profile 2>/dev/null | grep -v '^export' | grep -v '^#' | grep -v '^PATH')" == "" ]]; then
    6.         cat >/root/.bash_profile <<"EOF"
    7. # .bash_profile
    9. # Get the aliases and functions
    10. if [ -f ~/.bashrc ]; then
    11.     . ~/.bashrc
    12. fi
    14. # User specific environment and startup programs
    16. PATH=$PATH:$HOME/bin
    18. export PATH
    20. EOF
    21.     fi
    23.     if [[ "$(grep -v '^$' </root/.bashrc 2>/dev/null | grep -v '^export' | grep -v '^#' | grep -v '^PATH')" == "" ]]; then
    24.         cat >/root/.bashrc <<"EOF"
    25. # .bashrc
    27. # User specific aliases and functions
    29. alias rm='rm -i'
    30. alias cp='cp -i'
    31. alias mv='mv -i'
    33. # Source global definitions
    34. if [ -f /etc/bashrc ]; then
    35.     . /etc/bashrc
    36. fi
    38. EOF
    39.     fi
    41. }
    43. __main

    设置好以后重新连接到终端即可